6/15/2023 0 Comments Cf 31 windows map no gps signalAccelerometer and GPS data were recorded at 10 second epochs and were combined to describe patterns of physical activity when both a GPS and accelerometer record were present (outdoors) and when there was accelerometer data only (indoors). Physical activity was measured by accelerometry (Actigraph GT1M) and children wore a GPS receiver (Garmin Foretrex 201) after school on four weekdays to record time outdoors. Participants were 1010 children (11.0 ± 0.4 years) recruited from 23 urban primary schools in South West England, measured between September 2006 and July 2008. The aim of this study was to investigate whether GPS data recorded outdoors were associated with objectively measured physical activity. The Global Positioning System (GPS) provides precise location data and can be used to identify when an individual is outdoors. Time outdoors may be a feasible intervention target to increase the physical activity of youth, but methods are required to accurately measure time spent outdoors in a range of locations and over a sustained period. Observational studies have shown a positive association between time outdoors and physical activity in children.
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